Lid support for ACPI

[Pavel Machek]

Hi!

Here's lid support for ACPI, please apply.

                                                                Pavel
--- clean/drivers/acpi/power.c  Wed Jan 31 16:14:33 2001
+++ linux/drivers/acpi/power.c  Sun Apr 22 23:02:25 2001
@@ -30,11 +30,11 @@
 int acpi_cmbatt_init(void);
 int acpi_cmbatt_terminate(void);
 
-/* ACPI-specific defines */
-#define ACPI_AC_ADAPTER_HID    "ACPI0003"
-
 static int ac_count = 0;
+static int lid_count = 0;
 static ACPI_HANDLE ac_handle = 0;
+static ACPI_HANDLE lid_handle = 0;
+
 
 /*
  * We found a device with the correct HID
@@ -60,11 +60,28 @@
        }
 
        printk(KERN_INFO "AC Adapter: found\n");
-
        ac_handle = handle;
-
        ac_count++;
+       return AE_OK;
+}
 
+static ACPI_STATUS
+acpi_found_lid(ACPI_HANDLE handle, u32 level, void *ctx, void **value)
+{
+       ACPI_DEVICE_INFO        info;
+
+       if (lid_count > 0) {
+               printk(KERN_ERR "Lid: more than one!\n");
+               return (AE_OK);
+       }
+
+       if (!(info.valid & ACPI_VALID_STA)) {
+               printk(KERN_ERR "Lid: _STA invalid\n");
+       }
+
+       printk(KERN_INFO "Lid: found\n");
+       lid_handle = handle;
+       lid_count++;
        return AE_OK;
 }
 
@@ -101,23 +118,54 @@
        return len;
 }
 
+static int
+proc_read_lid_status(char *page, char **start, off_t off,
+                    int count, int *eof, void *data)
+{
+       ACPI_OBJECT obj;
+       ACPI_BUFFER buf;
+
+       char *p = page;
+       int len;
+
+       buf.length = sizeof(obj);
+       buf.pointer = &obj;
+       if (!ACPI_SUCCESS(acpi_evaluate_object(lid_handle, "_LID", NULL, &buf))
+               || obj.type != ACPI_TYPE_INTEGER) {
+               p += sprintf(p, "Could not read lid status\n");
+               goto end;
+       }
+
+       if (obj.integer.value)
+               p += sprintf(p, "open\n");
+       else
+               p += sprintf(p, "closed\n");
+
+end:
+       len = (p - page);
+       if (len <= off+count) *eof = 1;
+       *start = page + off;
+       len -= off;
+       if (len>count) len = count;
+       if (len<0) len = 0;
+       return len;
+}
+
 int
 acpi_power_init(void)
 {
-       acpi_get_devices(ACPI_AC_ADAPTER_HID, 
-                       acpi_found_ac_adapter,
-                       NULL,
-                       NULL);
+       acpi_get_devices("ACPI0003", acpi_found_ac_adapter, NULL, NULL);
+       acpi_get_devices("PNP0C0D", acpi_found_lid, NULL, NULL);
 
        if (!proc_mkdir("power", NULL))
-               return 0;
+               return -EBUSY;
 
-       if (ac_handle) {
-               create_proc_read_entry("power/ac", 0, NULL,
-                       proc_read_ac_adapter_status, NULL);
-       }
+       if (ac_handle)
+               create_proc_read_entry("power/ac", 0, NULL, 
+proc_read_ac_adapter_status, NULL);
+       if (lid_handle)
+               create_proc_read_entry("power/lid", 0, NULL, proc_read_lid_status, 
+NULL);
 
        acpi_cmbatt_init();
 
        return 0;
 }
@@ -127,9 +176,8 @@
 {
        acpi_cmbatt_terminate();
 
-       if (ac_handle) {
-               remove_proc_entry("power/ac", NULL);
-       }
+       if (ac_handle) remove_proc_entry("power/ac", NULL);
+       if (lid_handle) remove_proc_entry("power/lid", NULL);
 
        remove_proc_entry("power", NULL);
 

-- 
I'm [EMAIL PROTECTED] "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at [EMAIL PROTECTED]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/